richard engel, on the outskirts of aleppo. >> you both just saw richard's report. aaron, let me start with you. how real, at this point, is the fear that bashar al assad's regime could use those chemical weapons against the rebels? >> i think the fear is real. the question is, what's the point? desperate men trapped in difficult circumstances might actually deploy these things. toward what ends is almost impossible to define. if they're used too close to syrian forces, to the jordanian borders, given the prevails winds, you could affect thousands of people. the options for blocking this are frankly pretty bad. if the united states, through use of air strikes, tries to take these out, assuming we know where they are, you have a dispersal problem. if you wait until they're used, we're talking about probably the insertion of ground forces in an effort to secure them. this situation in syria, though, with or without chemical weapons, is going to get a lot worse before it gets worse. >> worse in what way? >> well, what you're seeing -- even if assad is overturned tomorr